Dump scow



DUMP scow Filed No v. e, 1939 2 She ets'-Shee t l I'NVENTOR.

Patented Sept. 29, 1942 DUMP SCOW Fra'nk R. Zimmerman, Duluth,-Minn.,assignor to .Superior Iron Works Wis.

Company, Superior,

Application November 6, 1939', Serial No. 303,065

1 Claim.

This invention relates to dump scows, and has special reference toimproved means for operating the doors of such scows.

One object of the invention is to provide means whereby less power isrequired for the operation of the doors of dump scows.

Another object is to so install such mechanism that the least strain andstress will occur in the operating mechanism when applied to the longerand larger type of scows now common in the art.

Other objects and advantages of the invention will appear in thefollowing description thereof.

Referring now to the accompanying drawings, forming part of thisapplication, and wherein like reference characters indicate like parts:

Figure 1 is a broken top plan view of a modern type of dump scow.

Figure 2 is a somewhat enlarged cross sectional view through one of thepockets of the scow illustrated in Figure 1.

Figure 3 is an enlarged transverse section through one of the pockets,illustrating in detail the door operating mechanism.

Figure 4 is an enlarged side elevation of the power transmitting meansfor operation of the doors of a hopper.

Figure 5 is an end elevation of a common split compression coupling,

Figure 6 is a side elevation of a common flanged coupling.

I am aware that somewhat similar mechanism is old in the art, andwherein power is transmitted from the hold of the scow to a pair ofhorizontally disposed shafts extending fore and aft of the scow andjournalled upon the side of the coaming of the hoppers of the scow. Insuch structure it has also been the custom to install the power unit atone end of the scow and apply the rocking motion to the transmissionshaft above the deck thereof from one end only, and this has resulted inmany unsatisfactory experiences on account of the extreme length of sucha shaft, in that it is common to all of the hoppers of the scow. In myimproved assembly such difficulty is reduced to a minimum as I haveinstalled the power unit substantially midships of the scow with thepower shaft I being formed of two independent sections of shaft, and themotor or engine as the case may be, illustrated at 2, being installedwithin the hold of the scow directly beneath the abutting ends of theshaft I. With this assembly it is man as at 3 extending from the powerunit upwardly to each of the parts of the shaft 1 and directly connectedthereto as by the customary crank arm 4, thus to provide the necessaryrockable motion of both parts of the shaft I when power is beingtransmitted therethrough.

The usual manually controlled transmission for the oppostie ends of eachindividual hopper is clearly illustrated in the drawings, it embodyingthe short, like sections of countershaft as illustrated at 5, installedabove the power shaft I, and each short section of shaft 5 is operatedby the application of its respective reciprocable hand lever 6 beingselectively engaged with the ratchet wheel 1 keyed to each section ofshaft 5 for rotating same when desired. Each shaft section 5 carries awinding drum 8 fixed thereto adjacent the bulkheads 9 at each end ofeach hopper, this being as is usual for the proper operation of thehoisting line [0 at each end of each hopper for raising or lowering thedoors thereof, said doors being illustrated at II in the drawings.

The instant invention is further novel at this point of installation incarrying out one of the principal objects of the invention, to wit: thatof lessening the actual power required in operating the line l2, whichis directly connected to the doors ll after passing over the usualcarrying sheave I3 mounted upon the inner wall of the bulkhead 9 of eachhopper. For this purpose a second hoisting line is indicated at 10,leading from the drum 8 to and about the sheave M, which is attached tothe otherwise free end of the hoisting line I2, and to the anchorage orattachment IS on the lower portion of the coaming I6 of each pocket.

In this manner it is obvious that the power applied from the shaft 5 isaugmented in its application to the hoisting line l2 and greatly reducesthe stress upon the entire power transmitting mechanism, thoughrequiring slightly longer time to accomplish the desired result.

It is to be noted that the power unit 2 contemplates the employment oftwo engines or motors I! for driving the shaft to which the pitmans 3are connected so that in the event something might happen to one of themotors the other could still be used in the proper functioning of themechanism.

A a further caution against unforseen accidents, the abutting ends ofthe two alined parts of the shaft l are shown as splined for thereception of any desired form of split compression obvious that theremust be a reciprocable pit- 5 coupling such as shown in Figure 5 inorder to cause the two sections to act as a single shaft. However insuch an event there still remains the advantage of driving same fromintermediate of its ends.

In lieu of the split coupling referred to, the two abutting ends of theshaft I may each be provided with a common flanged coupling member asshown in Figure 6 and wherein obviously only the application or removalof the through bolts 18 will suffice to either unite or separate theportions of the shaft.

Having thus described my invention, what I claim and desired to secureby Letters Patent, is:

Door operating means for a dump scow having a plurality of hopperstherein surrounded by an upstanding coaming and a pair of hinged doorsat the bottom of each hopper, comprising door operating means for thedoors of each hopper, mounted upon one side of said coaming, two axiallyalined power transmitting shafts, disposed beneath said door operatingmeans longitudinally of said scow and adjacent said coaming', meansbelow each of said door operating means, carried by said alined shafts,for selective transmission of power therefrom to said door operatingmeans, and a power unit within said scow below the meeting ends of saidshafts, and individual means connecting the meeting ends of each shaftwith said power unit for imparting uniform rockable 15 motionsimultaneously to both shafts.

FRANK R. ZIMMERMAN.

